- r = iovw_put(&source->iovw, data, source->data_size);
- if (r < 0) {
- log_error("failed to put binary buffer in iovect");
+ field = (char*) data - sizeof(uint64_t) - source->field_len;
+ memmove(field + sizeof(uint64_t), field, source->field_len);
+
+ r = iovw_put(&source->iovw, field + sizeof(uint64_t), source->field_len + source->data_size);
+ if (r < 0)